I am trying to find out if there is any way to tune the completely stock 3.0L V6 (specifically in a manual '91 Daytona) without any kind of aftermarket parts. Like adjusting fuel pressure, timing, tricking sensors to "correct" for "bad" air/fuel ratios, etc. So far I've found nothing at all. Anyone have some advice for me? Just looking to see what can be improved on within the constraints of a stock engine, ECU, and fuel system.